Modern domestic dogs are descended from the European wolf. Humans have been selectively breeding dogs only for the last few hundred years, and they are still refining breeds with traits such as superior intelligence and ... More »

www.reference.com Pets & Animals Pets Dogs

Most dogs can understand up to 250 words and phrases making them as intelligent as the average 2-year-old child. Puppies have 28 teeth and adult dogs have 42. More »

www.reference.com Pets & Animals Pets Dogs

Prairie dogs are burrowing rodents that live in colonies called towns. There are five species of prairie dogs, all of which are native to North America. While they were once the most numerous animals in North America, hu... More »

www.reference.com Pets & Animals Mammals

The paperwhite, also known as the daffodil or narcissus, is toxic to domestic dogs and many other mammal species, including humans. All parts of the plant contains a toxic alkaloid called lycorine. The bulbs are consider... More »

www.reference.com Pets & Animals Pets Dogs

The Pomeranian breed is descended from larger dogs that pulled sleds in the Arctic north. In the late 19th century, Queen Victoria of England acquired a small orange Pomeranian and began to breed them, greatly increasing... More »

www.reference.com Pets & Animals Pets Dogs

Most domestic dogs are completely weaned off of their mother's milk by the time they are 7 to 8 weeks old; larger breeds wean earlier. Weaning is a gradual process and begins at 3 to 4 weeks of age, when puppies begin to... More »

Most dogs can understand up to 250 words and phrases making them as intelligent as the average 2-year-old child. Puppies have 28 teeth and adult dogs have 42. More »

www.reference.com Pets & Animals Pets Dogs